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arXiv 1306.1156hep-ph
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用费曼图解法计算MSSM的荷电希格斯玻色子质量

The Charged Higgs Boson Mass of the MSSM in the Feynman-Diagrammatic Approach

M. Frank, L. Galeta, T. Hahn, S. Heinemeyer, W. Hollik, H. Rzehak, G. Weiglein

摘要:

在最小超对称标准模型(MSSM)中,对\sim 126 GeV处的希格斯信号的解释关键取决于模型中其他希格斯态的预测性质,如带电希格斯玻色子的质量MH+-。这个质量是在MSSM中用费曼图解法用实参数计算的。结果包括完整的单循环贡献和O(alpha_t alpha_s)的双循环贡献。单回路的贡献导致相当大的移动MH+的预测,达到\sim 8 GeV的相对较小的值的M_A。根据进入影响底夸克质量和底汤川耦合之间关系的修正的μ参数的符号和大小,甚至可以发生更大的影响。双圈O(alpha_t alpha_s)项能使MH ~+-移动2GeV以上。对于我们已经研究过的例子,两个回路的贡献通常约为单回路校正的30%。这些效应可能与带电MSSM希格斯玻色子的精确分析有关。

英文摘要:

The interpretation of the Higgs signal at \sim 126 GeV within the Minimal Supersymmetric Standard Model (MSSM) depends crucially on the predicted properties of the other Higgs states of the model, as the mass of the charged Higgs boson, MH+-. This mass is calculated in the Feynman-diagrammatic approach within the MSSM with real parameters. The result includes the complete one-loop contributions and the two-loop contributions of O(alpha_t alpha_s). The one-loop contributions lead to sizable shifts in the MH+- prediction, reaching up to \sim 8 GeV for relatively small values of M_A. Even larger effects can occur depending on the sign and size of the mu parameter that enters the corrections affecting the relation between the bottom-quark mass and the bottom Yukawa coupling. The two-loop O(alpha_t alpha_s) terms can shift MH+- by more than 2 GeV. The two-loop contributions amount to typically about 30% of the one-loop corrections for the examples that we have studied. These effects can be relevant for precision analyses of the charged MSSM Higgs boson.

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